Valve



O. LARSEN VALVE Filed July 1o, 1 926 June 5, 1928. 1,672,223

Patented June 5, 1928.

UNI-rei) sr 'Ares PATENT OFFICE.

oLAr-IiAnsnN, oni-foar ATKINSON, WIscoNsIm'assIeNonTo rnncnnaiyinnyfrnoin AGE MFG. COMPANY, or CHICAGO, ILLINOIS, Av oonPoRATIoN orV ILLINOIS.

VALVE.

apypiieation ined Juiy 1o,

The invention relates to valves 'for the control of the flow of .edible fluids, and knovvn as sanitary valves..v I

In the preparation of milk for food consumption, one of the processes employed 'is lasteurization, by which the pathogenic bacteria are destroyed. The common method. of vPasteuriza'tion is to hold quantities yof milk at a pre-determined temperature lfor a. pre-determined time in .insulated orheated containers of large capacity. :The milk is ordinarily treated in successive batches, the containers being lilledand emptied through sanitary piping controlled by sanitary valves positioned at the inlets and outlets of the containers. It will vbe obvious that any vleakage or failure in theseivalves will permit the uncontrolled flow through Vthe containei' of a quantity of milk which has not been held for the required time at tlienecessaify temperature. If such leakage is permitted to pass into ktliediscliarge conduitsvvith thel properly Pasteurized milk, the latter is in danger ofl reinoculation by 'the' undestroyed bacteria in the-milk which has escaped the prescribed treatment. Y

Also it is obviously necessary -that all 'contaiiiers, piping andconti'olling 'valves used in the treatment o'f milk for food consumption be kept in a sanitary condition. This requires thatsuch apparatusbe constructed so that the vparts may be readily disassem-l bled forythorough cleaning after Ytheir operativeuse. 'ff r- It is the principal object of this invention .to provide an improve'dfsanitary valve which is constructed :to directv outwardly frointhe main passages any leakage occuriingin the valve ywhen it is in closed position, vand especially adapted to Wholly; drain the valve chamber of suclileakag'e Whenfoperating on va substantially vertical axis as when controlllingfa downwardly opening'outlet. ,A further object is to lprovide a Vvalve ofsiinple construction having fevv parts Which may be conveniently and quickly taken rdown .for cleaning. Y

Other objects-and advantagesivill be apparent in the following `detailed description of a preferred embodiment ofthe invention which I have selected for illustration @in the accompanying drawings.` It vwill 'be understood, however, that various changes .in form, construction and arrangement maybe made by those skilled inthe art Without de- 1926. Serial No. 121,531.

parting from the scope and spirit ofthe invention as expressed Ainthe vappended claims. f Referring to the drawings, Fig; 1. is `a sectional side elevation rof the valve and Fi 2; y

is a front elevation of the same. The re erence numerals 1A and 2 indicate the bottom and side Walls respectively -of a tank, Within Which and spaced therefrom is a milkcontainer S-adapted to receive batches of milk for-Pasteurization treatment. ."The' intervening space 4 is provided f 65' y or a heating .med-

ium, usually hot-Water.v An outlet opening" i 5 is Vprovided in 'the bottom Wall of the' container 3,ivitiliin Which is .positioned a' tube'n preferablylhaving an 'outwardly flared upper 'end 7 bearing upon the margin of the container Wallv about the .outlet opening to provide-a smooth junction therewith.` The tube 6 is securedin positionjby -means .of a` nut A8 threaded upon the tube andbearing upon the underside ofthe container wall. f

rllie tube 6 `extends through the :bottom Wall 1 ofthe holder tank, and is preferably secured in sealed relation thereto by :a `pair of flanged nuts `9- and 10, also threaded upon the tube 6 and bearing upon the upper and lower surfaces of the yta'iikivall l .with suitable gaskets therebetween. "'lfhethreaded lovver end of the tube 6 carries a union nut 11 -by means of which acasing'lQ is .detachg ably secured to -tlietube 6. The casing 12 is provided With a chamber 13: openingup.- -Wardly in communication with the .passage through the tubey, and opening laterally 'i rinto a passage 14 formed in a lateral extension 15 of the casing. i

I rIIhe tube 6 forms the discharge outlet for the container 3, and 'is cont-rolled at its Vupper end by a -valve'16` -havingits seat in the end Vof the tube 6 and preferably provided with 9 depending guidewings 17 extending lintouthe tube 6 in sliding engagement with the iiiterior surface thereof. y Avring :18 may be vprovided on theV upper sur-face ofthe valve 16 for y the purpose of lifting the latter .out of-it's seatfor cleaning.

The valve I6 vis preferably operated from below by means of a rod-19 extending into an axial Vhub 20 formed on the under-surlface ofthe valve 16 and arra'ii'ged'for axially sliding 'engagement therein, so -t-hati'fthere may be substantial upward movement y of the rod Within theliub before the end of the rod engages the valve to lift iti-from its seat.

The vcasi-ngy 12 ispreferably`construeted with an open lower end of the chamber 13 iv Y for the discharge of any accumulated leak- `end of the casing and secured in position as by eye bolts and nuts 22. The'upper surface of the plug 21 forms the bottom of the chamber 13, and is radially inclined inwardly to form a sump for the accumulation of any leakage, at the center of which opens a passage l23 extending down through the plug age. The upper surface of the plug 21 is ypreferablypositioned below the lower margin'of the lateral opening into the passage The leakage discharge passage 23 is formed with an enlarged lower portion forming an intermediate shoulder 24. The` passage is controlled-by a valve 25 adapted to be seated upon the intermediate shoulder 211A and provided with upwardly extending guide wings 26 extending` through the constricted upper portion of the passage 28. The periphery of the valve 25 may also have guiding engagement with the enlarged lower portion of the passage and have spaced recesses 27 provided for the escapeof the liquid about the valve. A depending stem 28 is provided at the lower end ofthe valve 25 for the operation of the latter, and preferably carries at its lowei end a bearing yoke 29 between the arms of which extends one end of an operating lever 80, ycentrally. pivoted on a bracket 31 supported upontlie casing 12, theopposite end of the lever being connected with an operating rod 32, which is controlled by suitable mechanism (not shown) vfor the periodicoperation of the valve. v

-The rod 19, by which the container -outlet valve 16 is operated, is fixed at its lower 'end in the upper portion of the leakage passage valve guide wings 26, and by reason of the axial play between the rod 19 and the outlet valve 16, the leakage valve 25 is lifted into position to close the latter passage before thecontinued operation of the leakage valve andthe rod 19 eflects vthe lifting of the outlet valve 16. To more effectively accomplish "this end it is preferable that the lower section 33 of that portion of the leakage valve which enters the constricted portion of the passage be of full diameter and enter the passage before the outlet valve 16 isvlifted. The stem 28 may also carry a leakage'receiving cup '34 having a laterally opening discharge -spout 35 adapted to direct the leakage into a suitable container. i

The lateral opening from the chamber 13 to the passage 14 is also valve controlled,

there being a valve 3,6 outwardly seated upon the margin of the opening and having a supporting stem 37 operatively carried in the hub 38 of a spider 39 supported in a recess formed in the end portion of the lateral extension 15 of the casing. Avspring 40 inner face of the lateral outlet valve 36. ln

the upward movement of the-'leakage valve 25, the bell crank is operated to move the lateral outletvalve away from its seatsothat the latter valve is opened and closed in cycle with the opening and closing of the container-outlet valve 16. e

The casing lateral extensionv 15 further. supports a shell la forming a conduit for the liquid discharged throughl the passage lll, andy is provided with a recessed flange 45 adaptedto receive 'the end. of suitable sanitary'piping for conducting away the treated liquid. As illustrated herein the shell les is held in vnormal position by means of yoke 416 removably engaging the flanged end of the extension 15 and carrying a threaded hand-operated stem 47 bearing :upon the shell 114 and securing it in position abutting the outer end of the extension 15. f

From the yforegoing description it will be 95 obvious that when the main liquid passage is closed with the tank outlet yvalve 16l and casing chamber outlet valve'36 seated, the leakage passage valve 25 is open, thus providing for the diversion through the leakage `passage of any liquid passing the container valve 16 while, the latter isin closed VVposition; also that in theoperation of opening the main passage valves the leakage passage valve is lirst closed so .that none of theliquid is wasted ink the normal discharge of the .treated liquid through the valve structure.

I claim as my invention: v 1. A ldevice of the class described, comprising a casing having a chamber withian passage valve effects the opening of'said inlet valve, a valve controlling said outlet opening, and means operable bythe closing movement of said passage valve to effect the opening of said outlet valve, said inlet and outlet valves being operable to closevsaid inlet and outlet openings respectively when said passage valve is moved intov openv position.

y2. A device of the class described, comprising a casing havinga chamber with an upwardly opening inlet and a laterally opening outlet and with a downwardly opening leakage passage, valves operatively control- 3. A device of the class described, com-rk prising a chambered casing having an inlet opening and an oppositely positioned leakage passage and having an outletA opening, a valve controlling said inlet opening, a valve controlling said leakage passage, a member attached to said passage valve having axially movable engagement with said inlet valve whereby said inlet valve is opened by the operation of'closing said passage valve, said inlet valve being thereby moved from its seat after the closure of said leakage passage and reversely being seated before the opening of said leakage passage, a valve con-V trolling said outlet opening, and means op# erable by said passageV valve to effect the opening of said outlet valve by the closing of said passage valve and to permit the closing of said outlet valve by the opening of said passage valve. y

4. A device of the class described, comprising a chambered casing having an inlet opening and an' oppositelyvpositioned leak- 'age passage and having an outlet opening,

valves controlling each of said openings and ysaid passage respect1vely,'a member opera-y tively connecting said passage valve and said inlet valve having provision for lost motion in relation to one of said valves, and a pivoted member operatively engaging said passage valve and said outlet valve, the closing movement of said passage valve effecting the opening of said inlet and outlet valves,

and the opening movement of said passage valve permitting the closing of said inlet and outlet valves. l

5. A device of the class described, comprising a chambered casing having an inlet opening andan outlet opening and a leakage passage positioned oppositely of said inlet opening,v valves controlling Vearch of `said openings and said passage respectively, a

rod attached to said' passage valve and adapted; to operatively engage said inlet valve to open thelatter with the closing movement of said passage valve, and abell crankrpivotally supportedv With one arm positioned for engagementkby said passage valve and the other arm positioned for engagement with said outlet valve whereby y said outlet valvefis opened by the closing movement of said passage valve.

In witness whereof I have hereunto'attachedl my signature.

g OLAF LARSEN.y 

